Insulated and ventilated refrigerant bunker

ABSTRACT

A refrigerated bunker comprising a body defining an enclosed space for holding dry ice; at least one ventilation port defined through an outside wall of the body, the ventilation port configured for venting gaseous carbon dioxide from the enclosed space as the dry ice sublimates; and a port controller configured for selectively interrupting the ventilation port.

PRIORITY/CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No. 62/002,274, filed May 23, 2014, the disclosure of which is incorporated herein by reference.

TECHNICAL FIELD

This disclosure generally relates to the field of refrigeration devices. Particular embodiments relate to refrigerated bunkers configured for placement inside a portable insulated ice chest, the refrigerated bunker for holding a quantity of a refrigerant.

BACKGROUND

Insulated containers are used for the transportation of refrigerated and frozen products, and are used in many industries for shipping a wide variety of products. Additionally, consumers often use insulated containers, such as portable insulated ice chests, to transport refrigerated food, frozen food, and beverage products so that they may be enjoyed at specific temperatures, and to prevent spoilage until the products are used.

Based on the required or desired temperature for a specific product, a user may choose to use a refrigerant such as water ice, gel packs, or dry ice. Each of these refrigerants has a distinct temperature range that it operates within. Water ice operates at a temperature of about 33 degrees Fahrenheit (F) and maintains that temperature by changing phases (solid to liquid). Gel packs, also referred to as “ice packs,” are engineered to maintain a similar temperature, but can range from approximately 5 to 50 degrees F. Finally, dry ice sublimates at a temperature of −110 degrees F. Thus, dry ice is only suitable as a refrigerant when the product temperature is desired to be in a very low range. For example, dry ice is not an acceptable refrigerant when seeking to refrigerate a canned beverage, such as soda. The extreme cold produced by sublimating dry ice can freeze the contents of the beverage container, resulting in the beverage container losing its integrity. Likewise, fruits, vegetables, sandwiches, and the like cannot be packed with dry ice as such foods would freeze solid and not be palatable.

SUMMARY OF THE DISCLOSURE

Several exemplary refrigerated bunkers for holding a refrigerant are described herein, and are illustrated in the drawings. Some exemplary refrigerated bunkers are configured for placement within a portable insulated ice chest or shipping container. Some exemplary refrigerated bunkers are configured for integration into a portable insulated ice chest or shipping container.

A first exemplary refrigerated bunker comprises a body and port controller. The body defines an insulated enclosed space to hold dry ice and comprises at least one ventilation port. The ventilation port is capable of an open position wherein when the dry ice sublimates, gaseous carbon dioxide can escape from the insulated enclosed space through the ventilation port to an outside space adjacent to the refrigerated bunker's body.

In addition to a body, the first exemplary refrigerated bunker further comprises a port controller configured for interrupting the ventilation port(s). When interrupted, the port(s) are generally impermeable; the gaseous, sublimated dry ice cannot readily escape the insulated enclosed space.

Optionally, the first exemplary refrigerated bunker's ventilation ports are capable of being partially opened, thus allowing a limited amount of gaseous, sublimated dry ice to escape the insulated enclosed space. This partial opening can be accomplished in a number of ways by the port controller, including through the use of a sliding mechanism, a rotatable portion, or another mechanism capable of wholly or partially blocking the ventilation port(s). The port controller can be marked with indicia corresponding to different levels of cooling. Optionally, the first exemplary refrigerated bunker could comprise a mounting device for allowing for releasable mounting within a desired cooling space, such as a portable insulated ice chest.

A second exemplary refrigerated bunker comprises a body, port controller, and mounting device. The body defines an insulated enclosed space for holding dry ice and comprises a plurality of ventilation ports. The port controller controls the ventilation ports, which are capable of adjustment to an open or closed position. When open, gaseous carbon dioxide is capable of venting to the space outside the insulated enclosed space, thus providing an increased level of cooling. Conversely, when closed, gaseous carbon dioxide is incapable of venting the space outside the insulated enclosed space, thus providing a decreased level of cooling. The mounting device of the second exemplary refrigerated bunker allows for releasable mounting within the desired cooling space.

Optionally, the second exemplary refrigerated bunker's ventilation ports are capable of being partially opened, thus allowing a limited amount of gaseous, sublimated dry ice to escape the insulated enclosed space. This partial opening can be accomplished by the port controller in a number of ways, including through the use of a sliding mechanism, a rotatable portion, or another mechanism, either capable of wholly or partially blocking the plurality of ventilation ports. T port controller can be marked with indicia corresponding to different levels of cooling.

A third exemplary refrigerated bunker comprises a portable insulated ice chest defining a first enclosed space, a body defining a second enclosed space, a port controller, and mounting device. The body comprises insulated walls configured to hold dry ice and at least one ventilation port. The port controller controls the ventilation port(s), which are capable of adjustment from an open position to a closed position. When open, gaseous carbon dioxide is capable of venting to the space outside the insulated enclosed space, thus providing an increased level of cooling. Conversely, when closed, gaseous carbon dioxide is incapable of venting the space outside the insulated enclosed space, thus providing a decreased level of cooling. The mounting device of the third exemplary refrigerated bunker attaches to the body, allowing for mounting to and releasability from the portable insulated ice chest.

Additional understanding of the devices and methods contemplated and/or claimed by the inventor can be gained by reviewing the detailed description of exemplary devices and methods, presented below, and the referenced drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a top side perspective view of a first exemplary refrigerated bunker.

FIG. 2 is a top side, plan view of the first exemplary refrigerated bunker illustrated in FIG. 1.

FIG. 3 is a right side, plan view of the first exemplary refrigerated bunker illustrated in FIG. 1.

FIG. 4 is a bottom side, plan view of the first exemplary refrigerated bunker illustrated in FIG. 1.

FIG. 5 is a bottom side, plan view of the port of the first exemplary refrigerated bunker illustrated in FIG. 1.

FIG. 6 is a right side, cross-sectional view of the first exemplary refrigerated bunker illustrated in FIG. 1.

FIG. 7 is an exploded bottom side perspective view of a second exemplary refrigerated bunker.

FIG. 8 is a bottom plan view of the second exemplary refrigerated bunker of FIG. 7.

FIG. 9 is a bottom side perspective view of the second exemplary refrigerated bunker of FIG. 7, illustrated with the ventilation closure in a closed position.

FIG. 10 is an exploded top side, perspective view of a third exemplary refrigerated bunker.

FIG. 11 is a top side, perspective view of the third exemplary refrigerated bunker of FIG. 10.

FIG. 12 is an exploded bottom side perspective view of a fourth exemplary refrigerated bunker.

DETAILED DESCRIPTION

The following description and the referenced drawings provide illustrative examples of that which the inventor regards as his invention. As such, the embodiments discussed herein are merely exemplary in nature and are not intended to limit the scope of the invention, or its protection, in any manner. Rather, the description and illustration of these embodiments serve to enable a person of ordinary skill in the relevant art to practice the invention.

The use of “e.g.,” “etc,” “for instance,” “in example,” “for example,” and “or” and grammatically related terms indicates non-exclusive alternatives without limitation, unless the context clearly dictates otherwise. The use of “including” and grammatically related terms means “including, but not limited to,” unless the context clearly dictates otherwise. The use of the articles “a,” “an” and “the” are meant to be interpreted as referring to the singular as well as the plural, unless the context clearly dictates otherwise. Thus, for example, reference to “a port controller includes two or more such port controllers, and the like. The use of “optionally,” “alternatively,” and grammatically related terms means that the subsequently described element, event or circumstance may or may not be present/occur, and that the description includes instances where said element, event or circumstance occurs and instances where it does not. The use of “preferred,” “preferably,” and grammatically related terms means that a specified element or technique is more acceptable than another, but not that such specified element or technique is a necessity, unless the context clearly dictates otherwise. The use of “exemplary” means “an example of” and is not intended to convey a meaning of an ideal or preferred embodiment. Words of approximation (e.g., “substantially,” “generally”), as used in context of the specification and figures, are intended to take on their ordinary and customary meanings which denote approximation, unless the context clearly dictates otherwise.

The use of “interrupting” means to break continuity or uniformity of a course, process, or condition, unless the context clearly dictates otherwise. Interruption of the refrigerated bunker's ventilation ports includes, but is not limited to, covering the outside of any ventilation port opening.

The use of “moderate” means of medium quantity, extent, or amount, unless the context clearly indicates otherwise.

The use of “mounted” means to set or place in a specific position, unless the context clearly indicates otherwise. The use of “mounted” includes, but is not limited to, permanent mounting or temporary, removable mounting.

The use of “portion of” means a part of any whole, either separated from or integrated with it, unless the context clearly indicates otherwise. Blocking a “portion of” any ventilation port includes, but is not limited to, blocking some ports and leaving other ports open or blocking some part of all ventilation ports.

The use of “insulative substance” means any material that prevents the loss of heat, unless the context clearly indicates otherwise, including but not limited to air, gasses, foam insulation (e.g., polystyrene, polyisocyanurate, polyurethane), organic material (e.g., cellulose, straw, wool), mineral wool, glass wool, and aerogel.

The use of “refrigerant” means any substance used in or as a cooling mechanism, including but not limited to water ice, gel packs, and dry ice. Although dry ice is frequently referred to herein as the preferred refrigerant, a skilled artisan will be able to select an appropriate refrigerant for insertion into the enclosed space of a body in a particular embodiment based on various considerations, including the intended use of the refrigerated bunker, the intended arena within which the refrigerated bunker will be used, and the equipment and/or accessories with which the refrigerated bunker is intended to be used, among other considerations.

The use of “indicia” means one or more indicium.

Several exemplary refrigerated bunkers for holding a refrigerant are described herein, and are illustrated in the drawings. Some exemplary refrigerated bunkers are configured for placement within a portable insulated ice chest or shipping container. Some exemplary refrigerated bunkers are configured for integration into a portable insulated ice chest or shipping container.

An exemplary refrigerated bunker comprises a body having at least one inside wall, at least one outside wall, at least one ventilation port extending between the inside wall and the outside wall, and at least one port controller for controlling whether the ventilation port is open, closed, or some position therebetween. The inside wall defines an enclosed space for holding a quantity of refrigerant. When the at least one ventilation port is in an open state, refrigerant located within the enclosed space is able to sublimate, releasing gaseous carbon dioxide through the at least one ventilation port and to the space outside of the refrigerated bunker. Conversely, when the port is generally closed, gaseous carbon dioxide is generally unable to escape through the at least one ventilation port. Preferably, the port controller can be placed in an intermediate position where the ventilation port or ports are partially open/partially closed. When in such an intermediate position, a limited quantity of gaseous carbon dioxide is able to escape through the at least one ventilation port and into the space outside of the refrigerated bunker. The effect of an open, closed, or intermediate position is temperature control. When the at least one ventilation port is closed, the outside space is the least cooled; when the at least one ventilation port is fully open, the outside space is the most cooled; and when the at least one ventilation port is placed in an intermediate position, the outside space is cooled at an intermediate level.

Referring initially to FIGS. 1 through 6, a first exemplary refrigerated bunker 102 is illustrated in general schematic format. The refrigerated bunker 102 is configured for insertion into, or otherwise use with, a portable insulated ice chest.

In the first exemplary refrigerated bunker 102 illustrated in these Figures, the refrigerated bunker 102 comprises at least one inside wall 106 which defines an enclosed space 108 inside the refrigerated bunker 102. The enclosed space 108 is configured for holding a quantity of a refrigerant.

In the first exemplary refrigerated bunker 102 illustrated in these figures, the inside wall 106 comprises six faces—a front face 110, a rear face (not illustrated), a first side face 114, a second side face 116, a top face 118, and a bottom face 120. The six faces are interconnected to define the enclosed space 108 configured for storage of the refrigerant (e.g., a block of dry ice).

Any suitable structure and/or material can be used for the walls of an exemplary refrigerated bunker, and a skilled artisan will be able to select an appropriate structure and material for the walls of an exemplary refrigerated bunker in a particular embodiment based on various considerations, including the intended use of the refrigerated bunker, the intended arena within which the refrigerated bunker will be used, and the equipment and/or accessories with which the refrigerated bunker is intended to be used, among other considerations. For instance, a skilled artisan may determine that plastic (including both rigid plastic and flexible plastic), fabric, rubber, metal, and composite materials are suitable for use as the material of walls of an exemplary refrigerated bunker. Materials hereinafter discovered and/or developed that are determined to be suitable for use in refrigerated bunker devices would also be considered suitable for use in a refrigerated bunker according to a particular embodiment.

The first exemplary refrigerated bunker 102 further comprises an outside wall 124. Like the inside wall 106, in the first exemplary refrigerated bunker 102 illustrated in these Figures, the outside wall 124 comprises six faces—a front outer face 126, a rear outer face 128, a first side outer face 130, a second side outer face 132, a top outer face 134, and a bottom outer face 136. The six faces are interconnected to further-define the enclosed space 108. Each of the six outer faces corresponds to its respective inner face and runs parallel thereto.

While a right, rectangular parallelepiped shape is utilized for the exemplary refrigerated bunkers in these Figures, illustration of such a shape is not intended as a limitation on possible shapes or configurations for an exemplary refrigerated bunker. A skilled artisan will be able to select an appropriate shape and configuration for an exemplary refrigerated bunker in a particular embodiment based on various considerations, including the intended use of the refrigerated bunker, the intended arena within which the refrigerated bunker will be used, and the equipment and/or accessories with which the refrigerated bunker is intended to be used, among other considerations. For instance, an exemplary refrigerated bunker can be cylindrically shaped, comprising two faces—a top face and a bottom face, wherein the top face and bottom face run parallel thereto and are connected by an elongated circular sleeve, which defines an inner, enclosed space. Alternatively, an exemplary refrigerated bunker can be in the shape of a hexagonal prism, or a sphere, or a pyramid, or a bag, or a box, or any other suitable shape or configuration.

Referring back to the first exemplary refrigerated bunker 102 of FIGS. 1 through 6, it is preferred that the corresponding inner faces and the outer faces are at least partially spaced apart and define an insulative portion 138 therebetween. It is preferred that the insulative portion 138 is preferably filled with an insulative substance 140 having insulated properties. The insulative substance 140 fills at least a portion of the insulated portion 138, allowing prolonged temperature control in the enclosed space 108. For instance, the insulative portion can comprise an insulative substance sandwiched between the at least one outside wall and the at least one inside wall.

At least one ventilation port 142 is defined through both the inside wall 106 and outside wall 124. When open, the ventilation port 142 is configured for venting gaseous carbon dioxide, as the dry ice sublimates, from the enclosed space 108 to an outside space adjacent the at least one outside wall 124. This venting process is accomplished by the at least one ventilation port 142 being defined through both the inside wall 106 and outside wall 124. In an exemplary refrigerated bunker, any number of ventilation ports 142 can be are located on any, some or all of the refrigerated bunker's front outer face 126, rear outer face 128, first side outer face 130, second side outer face 132, top outer face 134, and/or bottom outer face 136.

Alternatively, one of the faces or walls, for instance top outer face 134, could comprise a pressure release mechanism 135. An exemplary pressure release mechanism 135 is illustrated in FIG. 1. The pressure release mechanism 135 configured to vent the enclosed space 108, thereby releasing pressure from inside the bunker 102, if sublimation ever causes the enclosed space 108 to ever become over pressurized. If the refrigerated bunker 102 is configured to be generally airtight, the pressure release mechanism 135 allows excess sublimate under pressure to be safely released from the refrigerated bunker 102. Examples of pressure release mechanisms include, but are not limited to valves, overpressure valves, pressure relief valves configured to allow sublimate to exit the enclosed space to eliminate excess pressure build up, a small slit of opening in an airtight liner of the lid of the bunker configured to allow for excess pressure to be released, the use of non-airtight seams between the lid and body of the bunker to allow for the release of any built up gas pressure, and the like.

In the exemplary refrigerated bunker 102 illustrated in these figures, referring particularly to FIG. 6, the at least one ventilation port comprises at least one upper port 151 defined through the inside wall 106 and into an intermediate chamber 149 defined within the receiver 166 through which the ventilation closure 141 is configured for sliding through. At least one lower port 153 defined through the bottom outer face 136 connects with the intermediate chamber 149 to allow sublimated dry ice to pass from the enclosed space 108 to the outside space when the ventilation port is not interrupted, as illustrated in FIGS. 4 and 6.

The port controller 146 is for controlling whether one or more of the ventilation ports 142 are open, closed, or some position therebetween. The port controller 146 illustrated with respect to the first exemplary refrigerated bunker 102 comprises an elongated ventilation closure 141 configured for sliding engagement with the ventilation port(s) 142 of the refrigerated bunker 102. Particularly, the refrigerated bunker 102 comprises a receiver 166 configured for slidably receiving the ventilation closure 141.

The receiver 166 of the refrigerated bunker 102 further comprises an elongated channel configured for sliding engagement with the ventilation closure 141. The ventilation closure 141 is configured to move in a first direction X wherein the ventilation closure interrupts the at least one upper port 151 and at least one lower port 153, preventing the sublimated dry ice 122 from entering the outside space. Conversely, the ventilation closure 141 can be moved in a second direction Y wherein the at least one upper port 151 and at least one lower port 153 are left uninterrupted, allowing for the sublimated dry ice 122 to enter the outside space.

Preferably, the ventilation closure 141 comprises at least one port 139, 139′ defined therethrough, whereby when said port 139, 139′ aligns with the upper port 151 sublimated dry ice is allowed to pass from the enclosed space 108 to the intermediate chamber 149. Further, when the at least one port 139, 139′ of the ventilation closure 141 aligns with the at least one upper port 151 it also aligns with the at least one lower port 153, which further comprises at least one ventilation port 142. Thus, in addition to passing from the enclosed space 108 to the intermediate chamber 149, sublimated dry ice can also pass from the enclosed space 108 to the outside space.

In addition to aligning with the at least one upper port 151 and at least one lower port 153, the ventilation closure 141 can also wholly or partially interrupt both the upper port 151 and lower port 153. By sliding the ventilation closure 141 into the receiver 166, a user can dictate the temperature in the enclosed space 108. For example, a user might wish to cool certain contents at a colder temperature. Conversely, other contents might not require the same level of cooling. Thus, when in a closed position, the at least one upper port 151 and at least one lower port 153 are fully interrupted and gaseous carbon dioxide is generally prevented from escaping the enclosed space 108. This provides a lower level of cooling of the outside space. Conversely, when in an open position, the at least one upper port 151 and at least one lower port 153 are uninterrupted, allowing the dry ice 122 to sublimate and gaseous carbon dioxide to escape from the enclosed space 108 to an outside space adjacent to the refrigerated bunker 102. This provides a higher level of cooling of the outside space.

Preferably, the ventilation closure 141 can be configured for adjustment to a partially interrupted position. In such a position, gaseous carbon dioxide can partially escape from the enclosed space 108. Consequently, a moderate level of cooling is provided to the outside space. Preferably, when the ventilation closure 141 is adjusted to a partially interrupted position, a portion of the at least one upper port 151 and at least one lower port 153 are covered. Optionally, the ventilation closure 141 can be configured such that a portion of the ventilation ports 142 of the at least one lower port 153 are partially interrupted and the remaining ventilation ports 142 are fully interrupted. Finally, optionally, the ventilation closure can be configured such that a portion of the ventilation ports 142 of the at least one lower port 153 are partially interrupted and the remaining ventilation ports 142 are fully uninterrupted. In any configuration, gaseous carbon dioxide can partially escape from the enclosed space 108 to provide a moderate level of cooling to the outside space.

Referring now to FIGS. 7, 8 and 9, a second exemplary refrigerated bunker 202 is illustrated. The second exemplary refrigerated bunker 202 is similar to the first exemplary refrigerated bunker 102 illustrated in FIGS. 1 through 6 and described above, except as detailed below. Thus, the second exemplary refrigerated bunker 202 includes at least one inside wall 206 which defines an enclosed space 208 inside the refrigerated bunker 202. The enclosed space 208 is configured for holding a quantity of a refrigerant. Further, at least one outside wall 224 is partially spaced apart from the inside wall 206, defining an insulative portion 238 therebetween. At least one ventilation port 242 is defined through both the inside wall 206 and outside wall 224 and configured to vent gaseous carbon dioxide, as the dry ice sublimates, from the enclosed space 208. A port controller 282 is operable connected to at least one ventilation port 242 to control whether one or more of the ventilation ports 242 are open, closed, or some position therebetween.

The second exemplary refrigerated bunker 202 further includes at least one indicum 278, at least one marker 280, at least one ventilation closure 284, at least one ventilation closure opening 286, and a pivot point 288.

The port controller 282 in the second exemplary refrigerated bunker 202 comprises at least one ventilation port 242. The at least one ventilation port is covered by a ventilation closure 284 having at least one ventilation closure opening 286. The ventilation closure 284 is attached to a pivot point 288 wherein when the ventilation closure 284 is rotated about the pivot point 288, the ventilation port 242 and the ventilation closure opening 286 can be aligned to release the sublimated dry ice 222 into the outside space.

When the ventilation port 242 and the ventilation closure opening 286 are aligned, the at least one ventilation port 242 is fully uninterrupted. Conversely, when the at least one ventilation port 242 and the ventilation closure openings 286 are not aligned, the at least one ventilation port 242 is fully interrupted. When the at least one ventilation port 242 and the ventilation closure openings 286 are semi-aligned, the at least one ventilation port 242 are partially interrupted.

The inside wall 206 and outside wall 224 of the second exemplary refrigerated bunker 202 are preferably made of a soft, flexible poly material, such as poly vinyl chloride. An insulative material, such as polyethylene, can be supplied between the inside wall 206 and the outside wall 224. Further, the top face 218 and top outer face 234 further comprise a closure 290 and at least one connector 291, 291′. The closure 290 is releasably connected to the front outer face 226 such that the enclosed space 208 of the refrigerated bunker 202 can be accessed. The connector 291, 291′ can be an adhesive, hook-and loop fastener, Velcro®, or any material that allows the closure 290 to be interchanged between a fastened and unfastened position.

While poly vinyl chloride is the preferred material of the walls of the second exemplary refrigerated bunker 202, any suitable structure and/or material can be used. A skilled artisan will be able to select an appropriate structure and material for the walls of an exemplary refrigerated bunker in a particular embodiment based on various considerations, including the intended use of the refrigerated bunker, the intended arena within which the refrigerated bunker will be used, and the equipment and/or accessories with which the refrigerated bunker is intended to be used, among other considerations. For example, a skilled artisan may determine that cardboard, plastic (including both rigid plastic and flexible plastic), fabric, rubber, metal, and composite materials are suitable for use as the material of walls of an exemplary refrigerated bunker.

Preferably, the port controller 282 further comprises indicia corresponding to different levels of cooling and a marker 280 for selecting the desired level of cooling. By rotating the ventilation closure opening 286, in the first direction X2 or the second direction Y2, to a position corresponding with the indicia 278, the ventilation ports 242 are fully interrupted, uninterrupted, or partially interrupted. To choose a specific level of cooling, a specific indicia 278 is aligned with a marker 280 on the second exemplary refrigerated bunker 202. Depending on the level of cooling chosen by aligning the indicia 278 and the marker 280, the ventilation ports 242 allow a specific level of cooling to the outside space.

Optionally, the second exemplary refrigerated bunker 202 further comprises a carrier carton 292 for holding dry ice 222. The carrier carton 292 comprises five faces—a bottom face 293, front face 294, rear face 295, first side face 296, and second side face 297. Each of the five faces are interconnected to define an opening 207 to hold the dry ice 222. At least one face further comprises at least one ventilation opening 298 to vent gaseous carbon dioxide as the dry ice 222 sublimates. The carrier carton 292 fits within the refrigerated bunker 202 and is preferably constructed of cardboard.

Referring now to FIGS. 10 and 11 the third exemplary refrigerated bunker 302 is illustrated. The third exemplary refrigerated bunker 302 is similar to the first exemplary refrigerated bunker 102 illustrated in FIGS. 1 through 6 and described above, except as detailed below. Thus, the third exemplary refrigerated bunker 302 comprises at least one inside wall 306 which defines an enclosed space 308 inside the refrigerated bunker 302. The enclosed space 308 is configured for holding a quantity of a refrigerant. Further, at least one outside wall 324 is partially spaced apart from the inside wall 306, defining an insulative portion 338 therebetween.

The third exemplary refrigerated bunker 302 further includes a removable lid 305, controller 350, power source 352, circulating fan 354, circulating fan discharge 356, and circulating fan return 358.

The inside wall of the third exemplary refrigerated bunker 302 comprises five faces—a bottom face, front face 310, rear face 312, first side face 314, and second side face 316. Each of the five faces are interconnected to define an opening 307 to an enclosed space 308. Similarly, the outside wall 324 of the third exemplary refrigerated bunker 302 comprises five faces—a bottom outer face 336, front outer face 326, rear outer face 328, first side outer face 330, and second side outer face 332. The inside wall 306 and outside wall 324 further comprise a circulating fan return 358 defined therethrough. A removable lid 305 sits atop the body and is removably attached thereto. When attached, the enclosed space 308 is fully defined.

The removable lid 305 of the third exemplary refrigerated bunker 302 comprises a controller 350 for controlling the operation of the refrigerated bunker 302, a power source 352 (such as a battery) for powering the controller 350 and at least one circulating fan 354, a circulating fan discharge 356 where the circulating fan 354 discharges air that has been drawn through the enclosed space 308, and a circulating fan return 358 through which the circulating fan 354 can draw airflow into the enclosed space. The controller 350, power source 352, and circulating fan 354 are operably connected such that the power source 352 powers the circulating fan 354, the power emitted from the power source 352 being regulated by the controller 350. The circulating fan discharge 356 is defined through the removable lid 305 such that cooled air can be vented to the outside space.

Additionally, the controller 350 can be operably attached to a temperature sensor to measure the temperature of the enclosed space 308. Through user input, the controller 350 can control the circulating fan 354 to keep the enclosed space 308 at a desired temperature, measured by the temperature sensor. For example, by prompting the circulating fan 354 to run at a higher speed, the enclosed space 308 can be kept at a cooler temperature. Conversely, by prompting the circulating fan 354 to run at a lower speed, the enclosed space 308 can be kept at a higher temperature.

Referring now to FIG. 12, the fourth exemplary refrigerated bunker 402 is illustrated. The fourth exemplary refrigerated bunker 402 is similar to the second exemplary refrigerated bunker 202 illustrated in FIGS. 7, 8, and 9 and described above, except as detailed below. Thus, the fourth exemplary refrigerated bunker 402 includes at least one outside wall 424 partially spaced apart from the inside wall 406, defining an insulative portion 438 therebetween. At least one ventilation port 442 is defined through both the inside wall 406 and outside wall 424 and configured to vent gaseous carbon dioxide, as the dry ice 422 sublimates, from the enclosed space 408. Additionally, the top face 418 and top outer face 434 further comprise a closure 490 and connector 491. The connector 491 configured for connection with a mating connector 491′, for instance as two hook and loop fastener portions, or other such attachments. The closure 490 is releasably connected to the front outer face 426 via said connectors 491, 491′ such that the enclosed space 408 of the refrigerated bunker 402 can be opened for access, and closed to use.

The fourth exemplary refrigerated bunker 402 comprises at least one ventilation port 442. It is preferred that the ventilation port(s) 442 comprises a ventilation opening 443 defined through the inside wall 406 and outside wall 424, and is configured to be covered with a removable cover 492, 492′, 492″. Preferably, each removable cover 492, 492′, 492″ can be marked with a different indicia, each indicia corresponding to a desired general temperature level. Thus, by removing one or more of the removable covers 492, 492′, 492″, a user can effectively cool the outside space adjacent the refrigerated bunker to a desired temperature level. For example, if a user desired the outside space to be maximally cooled, he or she could remove all removable covers 492, 492′, 492″. Conversely, if the user desired the outside space to remain at about its then-current temperature, he or she could leave all of the removable covers 492, 492′, 492″ in place. The outside wall 424 of the fourth exemplary refrigerated bunker 402 comprises five faces—a bottom outer face 436, front outer face 426, rear outer face 428, first side outer face 430, and second side outer face 432.

In a fifth exemplary refrigerated bunker, the refrigerated bunker further comprises a mounting device for releasably mounting the refrigerated bunker within a portable insulated ice chest or shipping container. The mounting device can comprise a first flange and a second flange. Preferably, the first flange and second flange are located on the bunker's top outer face and bottom outer face and run parallel to each respective face's surface. The flanges are configured such that the refrigerated bunker can be placed within a portable insulated ice chest and each flange is able to rest on the rim atop the portable insulated ice chest, for instance in a manner similar to a plastic tray typically utilized with such portable insulated ice chests.

In a sixth exemplary refrigerated bunker, the refrigerated bunker is configured to attach to the lid or door of the portable insulated ice chest through the use of a fastener or other mechanism, for instance a threaded screw. Alternatively, the refrigerated bunker could comprise a replacement lid (or door) on a preexisting cooler, could be incorporated into a replacement lid (or door) on a preexisting cooler, or could comprise a lid (or door) on a portable insulated ice chest. For instance, the portable insulated ice chest could comprise a lid, and the lid could define a recess therein configured for receiving a refrigerant, for instance a block of dry ice. The ice chest lid could further comprise a panel for enclosing the recess. The recess defining an enclosed space. The panel could be hingedly attached, and include a closure enabling the panel to be held in a closed position, enclosing the recess. The panel having an inside wall, an outside wall, and at least one ventilation port extending between the inside wall and the outside wall. The panel could further comprise at least one port controller for controlling whether the ventilation port is open, closed, or some position therebetween. When the at least one ventilation port is in an open state, refrigerant located within the enclosed space is able to sublimate, releasing gaseous carbon dioxide through the at least one ventilation port and to the space outside of the refrigerated bunker. Conversely, when the port is generally closed, gaseous carbon dioxide is generally unable to escape through the at least one ventilation port. Preferably, the port controller can be placed in an intermediate position where the ventilation port or ports are partially open/partially closed. When in such an intermediate position, a limited quantity of gaseous carbon dioxide is able to escape through the at least one ventilation port and into the space outside of the refrigerated bunker. The effect of an open, closed, or intermediate position is temperature control. When the at least one ventilation port is closed, the outside space is the least cooled; when the at least one ventilation port is fully open, the outside space is the most cooled; and when the at least one ventilation port is placed in an intermediate position, the outside space is cooled at an intermediate level.

In a seventh exemplary refrigerated bunker, the refrigerated bunker includes a plurality of indicia and a marker. The ventilation closure of the seventh exemplary refrigerated bunker comprises a plurality of indicia corresponding to different levels of cooling. For instance, such indicia could comprise numerals located on the face of the ventilation closure corresponding to a general temperature. The numerals could be aligned in a linear manner, ranging from the highest level of cooling to the lowest level of cooling. In use, by sliding the ventilation closure, in a first direction or a second direction, to a position corresponding with the indicia, the ventilation ports can be fully interrupted, fully uninterrupted, or partially interrupted. To choose a particular general level of cooling, specific indicia could be aligned with a marker on the seventh exemplary refrigerated bunker. Depending on the level of cooling chosen by aligning the indicia and the marker, the ventilation ports allow different levels of cooling to the outside space.

In an eighth exemplary refrigerated bunker, the refrigerated bunker includes a rim, an elongated channel, bottom, first side wall, second side wall, plurality of indicia, and marker. The eighth exemplary refrigerated bunker is configured for insertion into, or otherwise use with, a portable insulated ice chest. The eighth exemplary refrigerated bunker comprises at least one inside wall facing an enclosed space, an outside wall, a plurality of ventilation ports, and a port controller. The refrigerated bunker's at least one inside wall and at least one outside wall define an insulative portion, filled with an insulative substance, located between the inside and outside walls and create the enclosed space, for holding dry ice. The plurality of ventilation ports are all configured for venting gaseous carbon dioxide, as the dry ice sublimates, from the enclosed space to an outside space adjacent to the at least one outside wall.

At least one ventilation port of the eighth exemplary refrigerated bunker comprises at least one ventilation opening, the ventilation opening having an elongated channel, a bottom, a first side wall, and a second side wall. The port controller configured to interrupt the ventilation port. When in a closed position, the ventilation port is fully interrupted by the port controller and gaseous carbon dioxide is generally prevented from escaping the enclosed space. This provides a lower level of cooling of the outside space. Conversely, when in an open position, the ventilation port is uninterrupted and gaseous carbon dioxide is allowed to escape from the enclosed space. This provides a higher level of cooling of the outside space.

Inside the elongated channel is a ventilation closure configured for sliding engagement with the elongated channel. The ventilation closure is operably attached to the port controller to move in a first direction X wherein the ventilation closure covers the ventilation opening thus preventing the sublimated dry ice from entering the outside space. Conversely, the port controller can move the ventilation closure in a second direction Y wherein the ventilation opening is uncovered, allowing for the sublimated dry ice to enter the outside space. When the ventilation port is partially covered by the ventilation closure, the sublimated dry ice can enter the outside space at a moderate rate.

The port controller operably attached to the ventilation closure further comprises indicia corresponding to one or more different levels of cooling. To choose a specific level of cooling, a specific indicia on the port controller is aligned with a marker on the eighth exemplary refrigerated bunker. Depending on the specific level of cooling chosen by aligning the indicia and the marker the ventilation closures are allow different amounts of sublimated dry ice to vent to the outside space. When the port controller is aligned to a cooler temperature, the ventilation closures move in a first direction X and leave the ventilation ports fully uninterrupted. Conversely, when the port controller is aligned to a less-cool temperature, the ventilation closures move in a second direction Y and leave the ventilation ports fully interrupted. When the port controller is aligned to a moderate temperature, the ventilation closures leave the ventilation ports partially interrupted.

The ninth exemplary refrigerated bunker further comprises a mounting device for releasably mounting the refrigerated bunker within a portable insulated ice chest. The mounting device comprises at least two flanges—a first flange and a second flange. Preferably, the first flange and second flange are located on the bunker's top outer face and bottom outer face and run generally parallel to each respective face's surface. The first flange and the second flange are configured such that the refrigerated bunker can be placed within a portable insulated ice chest and each flange is configured for resting on a rim atop the portable insulated ice chest.

In the tenth exemplary refrigerated bunker, the refrigerated bunker includes a rim. The tenth exemplary refrigerated bunker is configured for insertion into, or otherwise use with, a portable insulated ice chest. The tenth exemplary refrigerated bunker comprises at least one inside wall, at least one outside wall, at least one ventilation port defined through the inside and the outside wall, and a port controller. The refrigerated bunker's at least one inside wall and the at least one outside wall define an insulative portion, for containing an insulative substance, between the inside and outside walls and create an enclosed space for holding dry ice. The at least one ventilation port is configured for venting gaseous carbon dioxide, as the dry ice sublimates, from the enclosed space to an outside space adjacent the at least one outside wall. This venting process is accomplished by the at least one ventilation port being defined through the at least one outside wall.

The port controller is configured to interrupt the at least one ventilation port. When in a closed position, the at least one ventilation port is fully interrupted and gaseous carbon dioxide is generally prevented from escaping the enclosed space. This provides a lower level of cooling of the outside space. Conversely, when in an open position, the at least one ventilation port is uninterrupted and gaseous carbon dioxide is allowed to escape from the enclosed space. This provides a higher level of cooling of the outside space.

The port controller can be configured for adjustment to a partially interrupted position. In such a position, gaseous carbon dioxide (sublimated dry ice) can partially escape from the enclosed space. Consequently, a moderate level of cooling is provided to the outside space.

The tenth exemplary refrigerated bunker further comprises a mounting device for releasably mounting the refrigerated bunker within a portable insulated ice chest. The mounting device comprises at least two flanges—a first flange and a second flange. Preferably, the first flange and second flange are located on the bunker's top outer face and bottom outer face and run generally parallel to each respective face's surface. The first flange and the second flange are configured such that the refrigerated bunker can be placed within a portable insulated ice chest and each flange is configured for resting on a rim atop the portable insulated ice chest.

In the eleventh exemplary refrigerated bunker, the refrigerated bunker includes a shipping container, wherein the refrigerated bunker is configured for insertion into, or otherwise use with, the shipping container.

In the twelfth exemplary refrigerated bunker, the refrigerated bunker includes an insulated bag. The twelfth exemplary refrigerated bunker comprises an insulated bag comprising at least one ventilation port defined through the insulated bag. The insulated bag is configured to store dry ice and vent gaseous carbon dioxide as the dry ice sublimates to an outside space adjacent the insulated bag. This venting process is accomplished by the at least one ventilation port being defined through the insulated bag.

It is noted that all structure and features of the various described and illustrated embodiments can be combined in any suitable configuration for inclusion in a refrigerated bunker according to a particular embodiment. For example, a refrigerated bunker according a particular embodiment can include neither, one, or both of an elongated channel and the rotatable portion described above.

The foregoing detailed description provides exemplary embodiments of the invention and includes the best mode for practicing the invention. The description and illustration of these embodiments is intended only to provide examples of the invention, and not to limit the scope of the invention, or its protection, in any manner. 

What is claimed is:
 1. A refrigerated bunker configured for use with a portable insulated ice chest, said refrigerated bunker comprising: a body, said body defining an enclosed space for holding dry ice, said body comprising at least one inside wall facing said enclosed space, said body comprising at least one outside wall, said body comprising an insulative portion between said inside wall and said outside wall, said body comprising at least one ventilation port defined through said outside wall, said insulative portion, and said inside wall, said ventilation port configured for venting gaseous carbon dioxide from said enclosed space to an outside space adjacent said outside wall as said dry ice sublimates; and a port controller configured for interrupting said at least one ventilation port, wherein said ventilation port can be adjusted from a closed position where the port controller interrupts the ventilation port, to an open position where the port controller does not interrupt the ventilation port; wherein in said closed position gaseous carbon dioxide from said enclosed space is generally prevented from venting to said outside space, thereby providing a lower level of cooling of said outside space by convection as said dry ice sublimates, and wherein in said open position gaseous carbon dioxide from said enclosed space is allowed to vent to said outside space, thereby providing an increased level of cooling of said outside space by convection as said dry ice sublimates.
 2. The refrigerated bunker of claim 1, wherein said port controller is configured for adjustment to a partially open position where the port controller partially interrupts said at least one port, thereby providing a moderate level of cooling of said outside space by convection as said dry ice sublimates.
 3. The refrigerated bunker of claim 1, wherein said body comprises a plurality of ventilation ports, and wherein said port controller is configured for adjustment to a partially open position where the port controller interrupts a portion of said plurality of ventilation ports.
 4. The refrigerated bunker of claim 1, wherein said outside wall comprises an elongated channel having a channel bottom and two side walls, said ventilation port terminating in said channel bottom.
 5. The refrigerated bunker of claim 4, wherein said port controller comprises a slidable portion configured for sliding engagement with said channel, said slidable portion configured to be moved between the closed position wherein said slidable portion covers said ventilation port to the open position where said slidable portion does not cover said ventilation port.
 6. The refrigerated bunker of claim 1, wherein said port controller comprises a rotatable portion configured to be rotated between the closed position wherein said rotatable portion covers said ventilation port to the open position where said rotatable portion does not cover said ventilation port.
 7. The refrigerated bunker of claim 1, wherein said refrigerated bunker comprises a plurality of indicia configured for indicating to a user when said port controller is in said open position and when said port controller is in said closed position.
 8. The refrigerated bunker of claim 7, wherein said indicia corresponding to different levels of cooling.
 9. The refrigerated bunker of claim 1, wherein said insulative portion comprises an insulative substance sandwiched between said at least one outside wall and said at least one inside wall.
 10. The refrigerated bunker of claim 1, wherein said outside wall comprises a releasable mounting portion for releasably mounting said refrigerated bunker within a portable insulated ice chest.
 11. The refrigerated bunker of claim 1, wherein said body comprises a plurality of ventilation ports, wherein said port controller is configured for adjustment to a partially open position where the port controller partially interrupts said at least one port, thereby providing a moderate level of cooling of said outside space by convection as said dry ice sublimates, wherein in said partially open position said port controller interrupts a portion of said plurality of ventilation ports, wherein said outside wall comprises an elongated channel having a channel bottom and two side walls, wherein said ventilation port terminates in said channel bottom; wherein said port controller comprises a slidable portion configured for sliding engagement with said channel, said slidable portion configured to be moved between the closed position wherein said slidable portion covers said ventilation port to the open position where said slidable portion does not cover said ventilation port.
 12. The refrigerated bunker of claim 1, wherein said body comprises a plurality of ventilation ports, wherein said port controller is configured for adjustment to a partially open position where the port controller partially interrupts said at least one port, thereby providing a moderate level of cooling of said outside space by convection as said dry ice sublimates, wherein in said partially open position said port controller interrupts a portion of said plurality of ventilation ports, wherein said port controller comprises a rotatable portion configured to be rotated between the closed position wherein said rotatable portion covers said ventilation port to the open position where said rotatable portion does not cover said ventilation port.
 13. The refrigerated bunker of claim 1, wherein said port controller is configured for adjustment to a partially open position where the port controller partially interrupts said at least one port, thereby providing a moderate level of cooling of said outside space by convection as said dry ice sublimates, and wherein said insulative portion comprises an insulative substance sandwiched between said at least one outside wall and said at least one inside wall.
 14. The refrigerated bunker of claim 1, wherein said portable insulated ice chest has a lid, and said body is configured for attachment to said lid or is incorporated in said lid.
 15. The refrigerated bunker of claim 1, further comprising a pressure release mechanism configured to vent over-pressurization of the enclosed space.
 16. A refrigerated bunker for use with a portable insulated ice chest having a cooling space, said refrigerated bunker comprising: a body, said body defining an enclosed space for holding dry ice, said body comprising at least one inside wall facing said enclosed space, said body comprising at least one outside wall, said body comprising an insulative portion between said inside wall and said outside wall, said body comprising at least one ventilation port defined through said outside wall, said insulative portion, and said inside wall, said ventilation port configured for venting gaseous carbon dioxide from said enclosed space to an outside space adjacent said outside wall as said dry ice sublimates, wherein said body comprises a plurality of ventilation ports; and a port controller configured for interrupting said at least one ventilation port, wherein said ventilation port can be adjusted from a closed position where the port controller interrupts the ventilation port, to an open position where the port controller does not interrupt the ventilation port, wherein said port controller is configured for adjustment to a partially open position where the port controller partially interrupts said at least one port, thereby providing a moderate level of cooling of said outside space by convection as said dry ice sublimates, wherein said port controller is configured for adjustment to a partially open position where the port controller interrupts a portion of said plurality of ventilation ports; wherein in said closed position gaseous carbon dioxide from said enclosed space is generally prevented from venting to said outside space, thereby providing a lower level of cooling of said outside space by convection as said dry ice sublimates, wherein in said open position gaseous carbon dioxide from said enclosed space is allowed to vent to said outside space, thereby providing an increased level of cooling of said outside space by convection as said dry ice sublimates, and wherein said outside wall comprises a releasable mounting portion for releasably mounting said refrigerated bunker within said cooling space.
 17. The refrigerated bunker of claim 16, wherein said outside wall comprises an elongated channel having a channel bottom and two side walls, said ventilation port terminating in said channel bottom, and wherein said port controller comprises a slidable portion configured for sliding engagement with said channel, said slidable portion configured to be moved between the closed position wherein said slidable portion covers said ventilation port to the open position where said slidable portion does not cover said ventilation port.
 18. The refrigerated bunker of claim 16, wherein said port controller comprises a rotatable portion configured to be rotated between the closed position wherein said rotatable portion covers said ventilation port to the open position where said rotatable portion does not cover said ventilation port.
 19. The refrigerated bunker of claim 16, wherein said outside wall comprises an elongated channel having a channel bottom and two side walls, said ventilation port terminating in said channel bottom, and wherein said port controller comprises a slidable portion configured for sliding engagement with said channel, said slidable portion configured to be moved between the closed position wherein said slidable portion covers said ventilation port to the open position where said slidable portion does not cover said ventilation port; wherein said insulative portion comprises an insulative substance sandwiched between said at least one outside wall and said at least one inside wall; and wherein said refrigerated bunker comprises at least one indicia configured for indicating to a user when said port controller is in said open position and when said port controller is in said closed position.
 20. A portable insulated ice chest, said portable insulated ice chest comprising: front, rear, and side walls, a bottom wall and a top wall, the walls together defining a first enclosed space, said walls comprising insulation; and a refrigerated bunker mounted within said portable insulated ice chest, said refrigerated bunker said refrigerated bunker comprising: a body, said body defining a second enclosed space for holding dry ice, said body comprising at least one inside wall facing said second enclosed space, said body comprising at least one outside wall, said body comprising an insulative portion between said inside wall and said outside wall, said body comprising at least one ventilation port defined through said outside wall, said insulative portion, and said inside wall, said ventilation port configured for venting gaseous carbon dioxide from said second enclosed space to said first enclosed space as said dry ice sublimates, wherein said body comprises a plurality of ventilation ports; and a port controller configured for interrupting said at least one ventilation port, wherein said ventilation port can be adjusted from a closed position where the port controller interrupts the ventilation port, to an open position where the port controller does not interrupt the ventilation port, wherein said port controller is configured for adjustment to a partially open position where the port controller partially interrupts said at least one port, thereby providing a moderate level of cooling of said outside space by convection as said dry ice sublimates, and wherein said port controller is configured for adjustment to a partially open position where the port controller interrupts a portion of said plurality of ventilation ports; wherein in said closed position gaseous carbon dioxide from said second enclosed space is generally prevented from venting to said first enclosed space, thereby providing a lower level of cooling of said outside space by convection as said dry ice sublimates, wherein in said open position gaseous carbon dioxide from said second enclosed space is allowed to vent to said first enclosed space, thereby providing an increased level of cooling of said first enclosed space by convection as said dry ice sublimates, and wherein said outside wall comprises a releasable mounting portion for releasably mounting said refrigerated bunker within said cooling space. 